Troubleshooting And Repair; Inspection Of Power Source Voltage; Inspection Of Air Filters; Inspection Of Drain Tank - Movincool CLASSIC PLUS 26 Service Manual

Before troubleshooting the system, the following inspection should be performed.

1. Inspection of Power Source Voltage

Check the voltage of the power source.
Single phase 208/230 volts (60Hz)
Check the operation and condition of the fuse or circuit breaker in the power source.

2. Inspection of Air Filters

Remove the air filters and check the element. If the element is dirty, wash it as described in the OPERA-
TION MANUAL supplied with the unit.

3. Inspection of Drain Tank

Be sure tank is fully drained.
The following chart is provided as a guide for categorized problem remedies. Detailed information is
contained in the OPERATION MANUAL supplied with the unit.
4. Troubleshooting Chart
Trouble
Unit does not operate at all
Unit starts, but stops immediately
Unit operates, but stops after a
few minutes
Water leakage from the unit
Abnormal noise and/or shaking
Insufficient Air Flow

TROUBLESHOOTING AND REPAIR

Probable Cause
• Check for Power at
Receptacle
• Check for Power at Terminal
Board
• Check for Power at Relay
Board
• Check all wire connections
• Defective Drain Tank Switch
• Check Relay Board Fuse
• Defective Relay Board
• Defective Control Board
• High Pressure Switch
activated, disconnected,
defective
• Jumper on Relay Board (J8)
not installed correctly
• Defective Condensate Pump
(optional)
• Defective Fan Motor
• Defective Compressor Motor
• Defective Relay Board
• Room and Freeze Thermistor
connectors are reversed on
control board
• Defective Compressor Motor
• Defective Fan Motor
• Drain Tank Full
• Fan Mode Switch is set to
"Stop" and compressor
cycled off
• Drain Tank not installed
• Drain Tank is defective
(cracked)
• Drain Pan hole is obstructed
• Loose Compressor mounting
nut
• Deformed or worn rubber
grommet on the compressor
mounting bolt
• Internal interference with
other components
• Damaged or out of balance
fan and scroll
• Fan mode switch on "Low"
• Defective fan motor
19
Trouble
Insufficient Air Flow (cont'd)
Insufficient Cooling
Compressor not operating
Fan Motor not operating
Probable Cause
• Clogged spine fins or
Evaporator or Condenser
(running unit without filter(s))
• Environmental conditions
exceed design specifications
• Clogged air filter
• Clogged spine fins
• Set point temperature
exceeds room temperature
• Defective room temperature
thermistor
• Leak in refrigerant system
• Restriction in refrigerant
system
• Compressor not operating
• Set point temperature
exceeds room temperature
• Unit is operating in Fan Only
Mode (Cool Mode not
activated)
• Jumper on Relay Board (J8)
not installed correctly
• Defective Condensate Pump
(optional)
• Defective Compressor
Capacitor
• Defective Thermistor
• Defective Compressor Motor
• Check wiring connections
• Defective Relay Board
• Defective Control Board
• Fan mode switch is set to
"Stop" and current Set Point
Temperature exceeds Room
Temperature
• Fan mode switch is set to
"Stop" and unit has been
equipped with optional
Condensate Pump that is
defective
• Fan mode switch is set to
"Stop" and Jumper on Relay
Board (J8) is not installed
correctly
• Check wire connections
• Defective fan motor capacitor
• Defective fan motor
• Defective Relay Board
• Defective Control Board